libGDX sample

MyGdxGame.java

package name.taoka.ugeee.basicgraphics;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class MyGdxGame extends ApplicationAdapter {
	SpriteBatch batch;
	Texture img;
	private Sprite sprite;
	private Pixmap pixmap;

	@Override
	public void create() {
		batch = new SpriteBatch();
		// img = new Texture(Gdx.files.internal("jet.png"));
		// sprite = new Sprite(img);

		// Pixmapはメモリ上で生イメージを生成するもの
		pixmap = new Pixmap(256, 128, Pixmap.Format.RGBA8888);

		// 赤で塗りつぶす
		pixmap.setColor(Color.RED);
		pixmap.fill();

		// ２本の線でXを引く
		pixmap.setColor(Color.BLACK);
		pixmap.drawLine(0, 0, pixmap.getWidth() - 1, pixmap.getHeight() - 1);
		pixmap.drawLine(0, pixmap.getHeight() - 1, pixmap.getWidth() - 1, 0);

		// 中心に円を描く
		pixmap.setColor(Color.YELLOW);
		pixmap.drawCircle(pixmap.getWidth() / 2, pixmap.getHeight() / 2,
				pixmap.getHeight() / 2 - 1);

		img = new Texture(pixmap);
		sprite = new Sprite(img);

		// Pixmapは不要になったら後処理をする
		pixmap.dispose();
	}

	@Override
	public void render() {
		// 黒(R=0,G=0,B=0)で初期化
		Gdx.gl.glClearColor(0, 0, 0, 1);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

		batch.begin();
		sprite.setPosition(0, 0);
		sprite.draw(batch);
		sprite.setPosition(Gdx.graphics.getWidth() / 2,
				Gdx.graphics.getHeight() / 2);
		sprite.draw(batch);
		batch.end();
	}

	@Override
	public void dispose() {
		batch.dispose();
		img.dispose();
	}
}